Integration of a 3D-printed electrochemical reactor with a tubular membrane photoreactor to promote sulfate-based advanced oxidation processes

[Display omitted] •Integration of SERPIC-UCLM® cell and TMPr for phototreatment of ROC/NFC by SR-AOPs.•SERPIC-UCLM® cell presents enhanced mass transport compared to existing reactors.•PMSA self-decomposes at neutral pH of ROC/NFC into PMS.•PMS and PDS showed the same degradation patterns of CECs in ROC/NFC phototreatment.•2.4 mM PMS increased the CECs degradation and ensured compliance with regulations. This study investigates the integration of an in-house 3D printed electrochemical cell − SERPIC-UCLM® cell – for the in situ generation of peroxymonosulfuric acid (PMSA) witha lab-scale tubular membrane photoreactor (TMPr) to evaluate the effectiveness of sulfate-radical advanced oxidation processes (SR-AOPs) in eliminating contaminants of emerging concern (CECs) from reverse osmosis and nanofiltration concentrates (ROC and NFC, respectively). First, the SERPIC-UCLM® cell was evaluated in terms of mass transport features employing the limiting current technique, demonstrating favorable volumetric mass transport rates (kmA ∼ 10–3 s–1) and Sherwood values (Sh > 300) under the laminar flow regime (110